/* Software License Agreement
 * 
 *     Copyright(C) 1994-2019 David Lindauer, (LADSoft)
 * 
 *     This file is part of the Orange C Compiler package.
 * 
 *     The Orange C Compiler package is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 * 
 *     The Orange C Compiler package is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 * 
 *     You should have received a copy of the GNU General Public License
 *     along with Orange C.  If not, see <http://www.gnu.org/licenses/>.
 * 
 *     As a special exception, if other files instantiate templates or
 *     use macros or inline functions from this file, or you compile
 *     this file and link it with other works to produce a work based
 *     on this file, this file does not by itself cause the resulting
 *     work to be covered by the GNU General Public License. However
 *     the source code for this file must still be made available in
 *     accordance with section (3) of the GNU General Public License.
 *     
 *     This exception does not invalidate any other reasons why a work
 *     based on this file might be covered by the GNU General Public
 *     License.
 * 
 *     contact information:
 *         email: TouchStone222@runbox.com <David Lindauer>
 * 
 */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <time.h>
#include <wchar.h>
#include <locale.h>
#include "libp.h"

wchar_t *_RTL_FUNC fgetws(wchar_t *restrict buf, int num, FILE *restrict stream)
{
    int i = 0,rv;
    if (stream->token != FILTOK) {
        errno = _dos_errno = ENOENT;
        return 0;
    }
    if (stream->extended->orient == __or_narrow) {
        errno = EINVAL;
        return 0;
    }
    stream->extended->orient = __or_wide;
    stream->flags &= ~_F_VBUF;
    if (!(stream->flags & _F_READ)) {
        stream->flags |= _F_ERR;
        errno = EFAULT;
        return 0;
    }
    if (stream == stdin)
        fflush(stdout);
    if (!(stream->flags & _F_IN)) {
        if (stream->flags & _F_OUT) {
            if (fflush(stream))
                return 0;
        }
        stream->flags &= ~_F_OUT;
        stream->flags |= _F_IN;
        stream->level = 0;
    }
    if (stream->flags & _F_EOF)
        return 0;
    if (num == 0)
        return 0 ;
    if (stream->hold) {
        buf[i++] = stream->hold ;
        stream->hold = 0;
    }
    for (;i < num;) {
        rv = __wgetc(stream);
        if (rv == WEOF)
            break;
        buf[i++] = rv ;
        if (rv == '\n') {
            break ;
        }
    }
    if (rv == WEOF && i == 0)
        return 0;
    buf[i] = 0;
    return buf;
}